<?php

if (!defined('BASEPATH'))
  exit('No direct script access allowed');
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 5.1.6 or newer
 *
 * @package		CodeIgniter
 * @author		Esen Sagynov
 * @copyright	Copyright (c) 2008 - 2011, EllisLab, Inc.
 * @license		http://codeigniter.com/user_guide/license.html
 * @link		http://codeigniter.com
 * @since		Version 2.0.2
 * @filesource
 */
// --------------------------------------------------------------------

/**
 * CUBRID Result Class
 *
 * This class extends the parent result class: CI_DB_result
 *
 * @category	Database
 * @author		Esen Sagynov
 * @link		http://codeigniter.com/user_guide/database/
 */
class CI_DB_cubrid_result extends CI_DB_result {

  /**
   * Number of rows in the result set
   *
   * @access	public
   * @return	integer
   */
  function num_rows() {
    return @cubrid_num_rows($this->result_id);
  }

  // --------------------------------------------------------------------

  /**
   * Number of fields in the result set
   *
   * @access	public
   * @return	integer
   */
  function num_fields() {
    return @cubrid_num_fields($this->result_id);
  }

  // --------------------------------------------------------------------

  /**
   * Fetch Field Names
   *
   * Generates an array of column names
   *
   * @access	public
   * @return	array
   */
  function list_fields() {
    return cubrid_column_names($this->result_id);
  }

  // --------------------------------------------------------------------

  /**
   * Field data
   *
   * Generates an array of objects containing field meta-data
   *
   * @access	public
   * @return	array
   */
  function field_data() {
    $retval = array();

    $tablePrimaryKeys = array();

    while ($field = cubrid_fetch_field($this->result_id)) {
      $F = new stdClass();
      $F->name = $field->name;
      $F->type = $field->type;
      $F->default = $field->def;
      $F->max_length = $field->max_length;

      // At this moment primary_key property is not returned when
      // cubrid_fetch_field is called. The following code will
      // provide a patch for it. primary_key property will be added
      // in the next release.
      // TODO: later version of CUBRID will provide primary_key
      // property.
      // When PK is defined in CUBRID, an index is automatically
      // created in the db_index system table in the form of
      // pk_tblname_fieldname. So the following will count how many
      // columns are there which satisfy this format.
      // The query will search for exact single columns, thus
      // compound PK is not supported.
      $res = cubrid_query($this->conn_id, "SELECT COUNT(*) FROM db_index WHERE class_name = '" . $field->table .
              "' AND is_primary_key = 'YES' AND index_name = 'pk_" .
              $field->table . "_" . $field->name . "'"
      );

      if ($res) {
        $row = cubrid_fetch_array($res, CUBRID_NUM);
        $F->primary_key = ($row[0] > 0 ? 1 : null);
      } else {
        $F->primary_key = null;
      }

      if (is_resource($res)) {
        cubrid_close_request($res);
        $this->result_id = FALSE;
      }

      $retval[] = $F;
    }

    return $retval;
  }

  // --------------------------------------------------------------------

  /**
   * Free the result
   *
   * @return	null
   */
  function free_result() {
    if (is_resource($this->result_id) ||
            get_resource_type($this->result_id) == "Unknown" &&
            preg_match('/Resource id #/', strval($this->result_id))) {
      cubrid_close_request($this->result_id);
      $this->result_id = FALSE;
    }
  }

  // --------------------------------------------------------------------

  /**
   * Data Seek
   *
   * Moves the internal pointer to the desired offset. We call
   * this internally before fetching results to make sure the
   * result set starts at zero
   *
   * @access	private
   * @return	array
   */
  function _data_seek($n = 0) {
    return cubrid_data_seek($this->result_id, $n);
  }

  // --------------------------------------------------------------------

  /**
   * Result - associative array
   *
   * Returns the result set as an array
   *
   * @access	private
   * @return	array
   */
  function _fetch_assoc() {
    return cubrid_fetch_assoc($this->result_id);
  }

  // --------------------------------------------------------------------

  /**
   * Result - object
   *
   * Returns the result set as an object
   *
   * @access	private
   * @return	object
   */
  function _fetch_object() {
    return cubrid_fetch_object($this->result_id);
  }

}

/* End of file cubrid_result.php */
/* Location: ./system/database/drivers/cubrid/cubrid_result.php */